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Ankylosing spondylitis (AS) is a type of chronic (long-term) arthritis that affects parts of the spine, including bones, muscles and ligaments.
Our Health A-Z contains more information on Ankylosing spondylitis.
If you are worried about this condition you can try our free AI Symptom Checker here.
Back pain is very common and normally improves within a few weeks or months.
Our Health A-Z contains more information on Back pain.
Important: If you have these symptoms, they may be unrelated to any of these conditions listed. If you are concerned about your symptoms then you should see a doctor.